. >>> coming up, we go live to south africa where president obama arrived. and he was one of the first to meet. the reverend jesse jackson will join us. that's next. [ ship horn blows ] no, no, no! stop! humans. one day we're coming up with the theory of relativity, the next... not so much. but that's okay. you're covered with great ideas like optional better car replacement from liberty mutual insurance. total your car, and we give you the money to buy one a model year newer. learn about it at libertymutual.com. liberty mutual insurance. responsibility. what's your policy? a man who doesn't stand still. but jim has afib, atrial fibrillation -- an irregular heartbeat, not caused by a heart valve problem. that puts jim at a greater risk of stroke. for years, jim's medicine tied him to a monthly trip to the clinic to get his blood tested. but now, with once-a-day xarelto®, jim's on the move. jim's doctor recommended xarelto®. like warfarin, xarelto® is proven effective to reduce afib-related stroke risk. but xarelto® is the first and only once-a-day prescr